Road-scarifier.



Wit" woes PATENTED DEC. 11, 1906. M. J. TODD.

ROAD SGARIFIBR.

APPLICATION rnnn MAY 24. 1906.

2 SHEETS-SHEET 1.

No. 838,478. PATENTED' DEC. 11, 1906. M. J. TODD.

ROAD SGARIFIBR.

APPLICATION I'ILED MAY 24. 1900.

2 SHEETS-SHEET B.

UNITED srarns PATENT orrron.

MARQUIS J. TODD, OF BUFFALO, NEW YORK, ASSIONOR TO BUFFALO STEAM ROLLER COMPANY, OF BUFFALO, N EWV YORK, A CORPORA- TION OF NEW YORK.

ROAD-SCARIFIER.

To all whom it may concern.-

Be it known that I, MAR UIs J. TODD, of Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Road-Scarifiers and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The primary object of this invention is to maintain a uniform pitch when working at different depths without necessarily having to adjust the scarifier-body.

A further object is to relieve the adjusting screw-rods of all lateral strain, so that should the wheels strike a stone or other obstruction there is no danger of such rods being broken or injured; and a further object is to provide improved means for securing the clevises to the frame.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In theaccompanying drawings, Figure 1 is a view in side elevation, partly in section. Fig. 2 is a plan view, also partly in section. Fig. 3 is an enlarged sectional view of the tooth-seat wall. Fig. 4 is a cross-section thereof. Fig. 5 is a detail partly in section.

Referring to the drawings, 1 designates the body of a scarilier having opposite side walls 2 and 3 and diagonal end walls 1, from which latter project goose necks 5. The body is mounted on a centrally-disposed axle 6, carrying supporting-wheels 7. I11 each gooseneck is formed a chamber open at its top and bottom, the side walls of such chamber being equipped with opposite openings to accommodate the trunnions 10 of a nut 12. The outer end of each gooseneck is removable, the line of division being vertically through the side openings, and such ends are held in place by bolts 13.

In nuts 12 work the adjusting screw-rods 15, which at their lower ends are swiveled to yokes 15, wherein are mounted the axles 16 of rollers 17. By adjusting either screw-rod body 1 may be tilted, the axle 6 forming its pivot. To remove unnecessary strain from these screw-rods, there is secured to each axle 16 a frame 18, composed of two parallel side bars, connected together and ivoted at their inner ends on a rod 19, passe through open- Specification of Letters Patent.

Application filed May 4, 1906. Serial No. 318,582.

Patented Dec. 11, 1906.

ings in a projection of the body, referably the base of the adjacent goosenec i, against which the sides of the frame abut. If either roller 17 should strike a stone or other obstruction, there will be no undue strain on its screw-rod, and these pivoted frames will also prevent lateral deflection of the rollers and their rods.

The sides of the body at both ends are of approximately T shape in plan view, being formed with rounded or bulged edges 20, which are hugged by the opposite jaws of clevises 21. Each clevis is formed in one piece and its spaced-apart jaws are drawn toward each other by a nutted bolt 22. this means the clevises may be readily secured at any desired point along the ends of the sides. The hooks on the ends of the draft-cl1ains enter the outer ends of the clevises.

23 designates the scarifier-teeth, all of which have tapered shanks which fit in tapered openings in end tooth-bars, which are shown as the diagonal end walls 1, being-retained therein by cotter-pins 24. As it frequently transpires that a change in the depth of penetration of all or some of the scarifier-teeth is desirable without changing the angle or pitch thereof, I form the walls 4 with two sets of seats for the scarifier-teeth, the seats of one set being on a higher plane than the seats of the other set. This will be understood by reference to Fig. 3, wherein it will be noted that the seats of the two sets alternate. This is accomplished by forming the seats in alternating raised and lowered portions and by making both sets of seats of corresponding thicknesses only one transverse opening is required in each tooth, the same cotter-pins being used when the teeth are in either of the two positions.

Ordinarily it is necessary to adjust the screw-rods in order to increase or lessen the depth of penetration. This changes the angle at which the teeth are presented to the soil; but according to my invention the teeth may maintain the same angle of penetration and still be caused to project a greater or a lesser distance into the soil. In consequence the adjusting-rods do not have to be manipulated to effect changes of depth of penetration.

The uses of scarifiers are well known in the too art. They are ordinarily moved back and forth by traction-engines, which are coupled first to one end of the frame and then to the other.

I claim as my invention 1. A road-scarifier comprising a pivotallymounted body having a gooseneck at each end, adjusting screw-rods extended through said goosenecks, nuts pivotally mounted in the latter with which said screw-rods engage, rollers on the lower ends of said screw-rods, and pivoted frames connectin the lower ends of said screw-rods to said bo y.

, teeth in either set of seats.

4. A road-scarifier comprising a pivoted body having diagonal -toothbars, means for raising and lowering said body at its opposite ends, scarifier-teeth in each of said tooth-bars, and means for increasing or decreasing the depth of penetration of such teeth without changing the angle or pitch thereof.

5. A road-scarifier comprising a pivoted body having diagonal tooth-bars formed with two sets of tooth-seats, the seats of one set being on a different plane from the seats of the other set, the scarifier-teeth, and means for securing the latter in said seats.

6. A road-scarifier comprising a body having diagonal tooth-bars formed with two sets of tooth-seats, the seats of each set alternating with the seats of the other set, all of the seats being of equal depth, the scarifierteeth, and means for securing. the latter in said seats.

7. A road-scarifier comprising a body having diagonal tooth-bars formed with two sets of tooth-seats, each setbeing on a differ ent plane, said body also having a gooseneck at each end, scarifier-teeth designed to be fitted in either set of seats, adjusting screwrods mountedin said goosenecks and having rollers at their lower ends, and brace-frames pivotally secured to the body and to the axles of said rollers.

8. A road-scarifier comprising a tilting MARQUIS J. TODD.

Witnesses:

JOHN A. DEWEY, GEORGE M..KEOUGH. 

